Julios



(No Model.)

J. W. WALTBRS.

v PIsToN PAG-KING. No. 367,873. Patented Aug. 9

- UNITED STATESv PATENT OFFICE.

JULIUs WM. WALTERs, orv NEW YORK, N. Y.

PlSTON-PACKING.

vSPECIFICATION 'forming part of Letters Patent No. 367,87, lated August 9, 1887.

Application filed March 30, 1887.

To -aZZ who-m, it 117,511/ concern,.-

Beit known that I, JULIUs WM. WALTERs,

a citizen of the United States, residing at Newf York city, in the county `of'New York and State of New York, have invented certain new and useful Improvements in Piston-Packing,

'of which the following is aspeeication, ret'- erence being had therein to the accompanying drawings.

Myinventiou relates to imp rovementsin piston-packing, and the object is to produce a reliable packing for square or rectangular pistous, more especially adapted to vibrating or pendulum engines, although also applicable to rotary or semirotary engines; also, to produce a packing Afor said engines which. will etl'ectually prevent leakage of steam, and at the same time will not retard the operation of` the piston in the cylinder or steam-chamber by packing it too tight, which is often occasioned by the ,ordinary packing in use; also, to make the packing self-adjusting in all required directions, so as to compensate for. the wear; furthermore, to facilitate the removal and replacement ofthe packing whenever necessary, and, nally, to produce a packing ap plicable to old as well as new engines.

. The invention to this ,end consists in tlie peculiar construction of thev details and the arA` rangement of parts of a piston for square or rectangular engines, as will be more fully described hereinafter, and specically pointed out in the claims, reference being had to the accompanying drawings and the letters of reference marked thereon. l

Like letters indicate similar parts in the different figures of the drawings, in which-- Figure l is a side elevationof a piston for a vibrating or pendulum engine provided with my improved packing. Fig. 2 is an endview of the same. Fig. 3 is a detail section of part ofthe same. Fig. 4 is a detached view of one. ofthe corner-pieces of the packing. Fig. 5 is a side elevation. Fig. 6 is anend view, partly in section. Fig. 7 is a detail view in section of a modification.

In the drawings, A represents the main body of a piston i'or'a vibrating or pendulumv engine having the usual trunnions, a, upon which it vibrates. The peripheral faces or serial No. 33h74. (No magi.)

edges ofthe body of the piston are provided ing packing-pieces c, d, and e t, and all of 1 1 or channel shape' in cross-section. The cornerpieces e are angular, and their edges are oblique and t againstthe oblique edges ofthe side pieces, c, and face-pieces d. They are preferably forced out against the inner surface of the segmental cylinder or steam chamber by means of elliptical or coil springs f, or their equivalents, placed in the groove b, formed in the packing-pieces, although they may be set out bysteam or` its equivalent. The ccrnerpieces c are held in position on the piston by means of pins g, which fit into slots L-in said corner-pieces to allow them to move -freely in and out in an oblique manner, so as to pack the corners of the cylinder or steamv chamber. f In the modification shown in Fig. 5 the packingpieces are set out by coil springsf.

The packing-pieces are constructed in a similar manner as shown at Fig. l, and suitable tilling-pieces applied at the joints to prevent leakage.

In the modication shown in Fig. 7 the pis-- ton-body 'isprovidcd with'a tongue, o, and into the recesses on each side thereof thc'plai n packingpieces p are fitted, being held in place by the followers q, and suitable springs are placed behind said packing-pieces to force them out. against the inner surface of the cylinder or steam-chamber, or steam inay be admitted to them.

In employing the springs behind the packing-pieces one or more springs may be used on'the sides or faces, and they may be made t0ngue,ncombinationwiththciuclosingpackwith slots g and pins 7:, and set out by the ing-pieces c d and the inclosng corner-pieces springs f, substantaly as shown and seb forth. ro

e, und the springs f, all constructed and arl In testimony whereof [affix my signature in mnged substantially as specified. presence of two witnesses.

2. The piston-packing described, consisting J ULIUS VTM. VALTERS. of the bodyof the piston having a tongue, in W'itnesses: combi nation with the nclosing packing-pieces JOHN S. ROAKE, c d and the inclosiug c01ne1pieces c, prm'ided JNO. M. \VILSON 

